Now, calculate the number of uranium atoms in
uranium sample as shown below:

Now, rate constant and number of atoms disintegrating per year
is related via following expression:

…… (2)

Here,

Number of atoms disintegration at
time is

Number of atoms disintegration at zero time is

Provide feedback (0)

Step 3 of 4

Substitute the provided values in equation (2) and calculate
number of atoms disintegrating per year as shown below:

Therefore,
are disintegrating per second.

Provide feedback (0)

Step 4 of 4

b) Number of atoms decaying per second now is easily estimated
using above mentioned decay equation. The initial
sample of uranium-238 has the same half-life as shown in first
part. Thus, exact determination of number of disintegration per
second requires exact knowledge of.
Therefore, number of atoms decaying per seconds is determined.

Get Study Help from Chegg

Chegg is one of the leading providers of homework help for college and high school students. Get homework help and answers to your toughest questions in math, calculus, algebra, physics, chemistry, science, accounting, English and more. Master your homework assignments with our step-by-step solutions to more than 3000 textbooks. If we don't support your textbook, don't worry! You can ask a homework question and get an answer in as little as two hours. With Chegg, homework help is just a few clicks away.